This Nylon U.S. American Flag has the best resistance to damaging ultraviolet radiation. The base fabric is the longest lasting Nylon material available, has a dense 200 denier weave and is manufactured in the U.S.A. It flies in the lightest breeze and provides the brightest colors for a vivid appearance. We guarantee that every flag will stay Colorfast for one full year from the date of purchase or we will replace it at no charge. Flags 8 ft. x 12 ft. are finished with canvas heading and roped heading for extra strength and six or more rows of lock stitching with back stitch reinforcements. Flags 15 ft. x 25 ft. and larger feature corner patches on the fly hem. All our US flags are made in the USA.